Line removable valve structure with extensible seal rings on pipeline support structure
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United States of America Patent
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-
Jun 14, 1983
Grant Date -
N/A
app pub date -
Feb 16, 1982
filing date -
Feb 16, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A line-removable valve structure wherein a cartridge containing a movable valve closure member and seals is received in a line-support structure including a pair of rigidly interconnected end plates forming line flanges. With the cartridge in place, seat rings threaded in the end plates, are turned to move axially inward to engage and seal against the ends of the cartridge. The seat rings are selectively turned by a worm gear or by hydraulically driven racks meshing with gear teeth around the seat rings.
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